Weekly Extreme Sudoku Competition for Feb 1 to Feb 7

Number 437, Extreme
by Crosswords Ltd. August puzzle packs Now Out!. Thanks for supporting our site.
Future Puzzle - will be submitted on the relevant day
1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
2 4             5
  8 3 6     2    
    6            
        5 4      
9 2     3     4 8
      8 1        
            4    
    9     7   1  
8 3           9 6